Feed mechanism for coil winder

ABSTRACT

The present invention provides an improved seed mechanism of a coil winding machine having a roller with a sharp edge to contact with pressure a feed shaft which rotates at a constant speed. The roller is mounted at a lower end of a vertical shaft in a traveler which moves along an axis of the feed shaft. The vertical shaft is supported rotatably by the traveler and has a guide grooved pulley to guide a metallic wire. The roller moves on the feed shaft spirally together with directional deviation of the grooved pulley caused from a minute change of winding direction of the metallic wire on a bobbin owing to a natural habit of the metallic wire to be wound as the traveler moves gradually, such that when finishing the winding of layer a coil layer obliqueness of the roller is reversed in compliance with the natural habit of the metallic wire so as to reverse the moving direction of the traveler.

United States Patent 91 Kubo [54] FEED MECHANISM FOR COIL WINDER [76]Inventor: Iwao Kubo, 3-go, l4-ban, 4-chome,

Ikegami, Ota-ku, Tokyo, Japan [22] Filed: May 13, 1970 [21] Appl. No.:36,838

2,987,268 6/1961 Haugwitz FOREIGN PATENTS OR APPLICATIONS France..242/l58 R Germany ..242/l58 R March 6, 1973 Primary Examiner--StanleyN. Gilreath Attorney-Steinberg & Blake 5 7 ABSTRACT The presentinvention provides an improved seed mechanism of a coil winding machinehaving a roller with a sharp edge to contact with pressure a feed shaftwhich rotates at a constant speed. The roller is mounted at a lower endof a vertical shaft in a traveler which moves along an axis of the feedshaft. The vertical shaft is supported rotatably by the traveler and hasa guide grooved pulley to guide a metallic wire. The roller moves on thefeed shaft spirally together with directional deviation of the groovedpulley caused from a minute change of winding direction of the metallicwire on a bobbin owing to a natural habit of the metallic wire to bewound as the traveler moves gradually, such that when finishing thewinding of layer a coil layer obliqueness of the rolleris reversed incompliance with the natural habit of the metallic wire so as to reversethe moving direction of the traveler.

PATENIEU 61975 3,719,333

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IN VENTOR.

FEED MECHANISM FOR con. WINDER BACKGROUND OF THE INVENTION Generallywhen metallic wires are to be wound up for coils on a bobbin withregularly wound layers, it is necessary to employ a certain feedmechanism to control the feeding speed of wire according to a prescribedconstant feeding speed.

However, wires have an inconstant thickness so that if, for example,there is a minute difference of O.l mm for a standard thickness, it willresult in a total difference of 1 mm during winding for cm underconstant feed, which will make a certain gap or an overpile on thebobbin.

Former feed mechanisms have not attained regular winding layers of coilson the bobbin practically.

The present invention provides an improved feed mechanism of a coilwinding machine in which it is not necessary artificially to adjust feedgap or double winding which will result from changes of thickness of thewires or size of the bobbin as well as making it possible to reverseautomatically owing to a natural habit of the wire so that the windingcoils to be produced will have a most exact and regular arrangement witha tight series of winding.

BRIEF SUMMARY OF INVENTION The present invention provides an improvedfeed mechanism which enables the wires themselves to choose and adjusttheir feed properly for strictly regularly winding layers on the bobbinnaturally always in sensitive response to their thickness.

The present invention provides an improved feed mechanism to feed thewires continuously to the bobbin with reversal from one end to anotherend of the bobbin and vice versa in alternation for producing exactlyregular winding layers of the coils under delicate control of feed incompliance with variation of inconstant thickness of the wires or a sizeof the bobbin.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a top plan view of a feedmechanism of a coil winding machine of the present invention;

FIG. 2 is a cross-section of an essential mechanism thereof;

FIG. 3 is a front elevation partly in section of FIG. 2; and

FIG. 4 is a top plan view of another embodiment thereof.

DETAILED DESCRIPTION OF INVENTION FIG. 1 shows a main shaft 1horizontally mounted on a pedestal 2 which carries a sub-pedestal 2a.

A multi-stage pulley 3 is fixed at the left end of the main shaft 1 toconnect with a prime mover not shown Medial pulleys 4, 5 are fixed at amedial position of the main shaft 1.

A feed shaft 6 is mounted horizontally also on the subpedestal 2a inparallel with the main shaft 1.

Pulleys 7, 8 fixed at the feed shaft 6 are opposed to and connected withthe medial pulleys 4, 5 through a belt 9 so that rotation of the mainshaft 1 is transmitted to the feed shaft 6.

A traveler 10 is mounted slidingly at the feed shaft 6 possibly to moveright or left on the feed shaft 6 owing to later mentioned reasons.

A pair of upper and lower rollers ll, 12, in FIG. 2 and 3, are mountedon the back side of the traveler 10 and sandwich a guide shaft 13 fixedon the sub-pedestal 2a in parallel with the feed shaft 6 to hold androtate along the guide shaft 13.

Four guide grooved pulleys 14, 15, 16, 17 are supported by the traveler10 and guide a metallic wire a in its winding direction on a bobbin notshown riding on the main shaft 1.

A supporting pillar 18 is fixedly mounted on the traveler 10 and has along slot 19 at its upper part, which receives and fixes a supportingplate 20 both ends of which support the pulleys 14, 15, possibly to Iadjust the height of the supporting plate 20 up or down in the long slot19.

A long slot 21 is also formed in the supporting plate 20 for fixingadjustably the pulleys 14, 15.

A vertical shaft 22 is mounted rotatably at the traveler 10 and insertsitself into a cradle 23 which carries the guide grooved pulley 16 andwhich connects with an adjustable fixture 24 carrying the guide groovedpulley 17. The adjustable fixture 24 is mounted at the cradle 23 by apin 25.

A semi-circular slot 26 is formed in the adjustable fixture 24 andsupported at the cradle 23 by the pin 25.

A screw 27 is screwed into the cradle 23 and inserted in thesemi-circular slot 26 so that the guide grooved pulley 17 can bepositioned and stabilized at a desired angle.

A long slot 28 is also formed in the adjustable fixture 24 so as toadjust a fixing position of the guide grooved pulley 17.

A hole 29 is formed in the traveler 10 and receives a bearing case 30having a cover 31. The bearing case 30 and the cover 31 contain verticalbearings 32, 33 and a horizontal bearing 34 which enable the verticalshaft 22 smoothly to rotate.

A roller 35 is supported by a supporter 36 fixed at the lower end of thevertical shaft 22. The roller 35 has a peripherally sharp andconic-sectional edge.

A spring 37 connects with the traveler 10 through a pin 38, a recesspart 39 receiving the feed shaft 6 and a carrier 40. Both ends of thespring 37 are caught by a lower hook 41 screwed into the carrier 40 andan upper hook 42 screwed into an upper part of the traveler 10 to bebridged between both hooks 41 42 so that to add spring force to theroller 35 as the edge of the roller 35 always contacts on the feed shaft6 with constant pressure. The recess part 39 is borne by the carrier 40.

A projecting rod 43 is jutted out of the back side of the cradle 23 andsandwiched between adjustable screw rods 44, 45 in FIG. 1, the left endof the adjustable screw rod 44 and the right end of the adjustable screwrod 45 contacting both sides of the projecting rod 43 adjustably to seta position of the cradle 23 with respect the feed shaft 6 so thatpositions of the guide grooved pulleys 16, 17 can also be adjusted. Theadjustable screw rods 44, 45 are screwed into a shaft bearer 46 mountedon a shoulder 22a of the vertical shaft 22 directly below the cradle 23.

Long holes 47, 47 are formed in the left and right parts of thesub-pedestal 2a and received bolts 48, 48.

In another example shown in FIG. 4, there is a motor 49 mounted on thesub-pedestal 2a.

Pulleys 50, 51 are connected with the motor 49.

A belt 9a is set on the pulley 7 or the pulley 8 fixed at the feed shaft6 and the pulley 50 or the pulley 51 also, so that the feed shaft 6 isrotated by the motor 49.

Accordingly the sub-pedestal 2a can be controlled to slide before andbehind on the pedestal 2 under situation of rotatability of the feedshaft 6 without any change of length of the belt 90.

Further a control handle 52 is fixed to the right end of pin 38, asviewed in FIG. 3, this pin 38 being supported for rotary movement by abracket fixed to the remainder of the traveler 10 and shown in FIG. 2just to the left of the carrier 40 which is urged by the spring 37 in acounterclockwise direction, as viewed in FIG. 2, together with the pin38 and the handle 52 with respect to the remainder of the traveler 10.When the control handle 52 is swung clockwise, as viewed in FIG. 2, therecessed part 39 will move downwardly away from the feed shaft 6 so thatthe traveler 10 can be easily adjusted to move to any position along thefeed shaft 6.

Symbols 53, 53 designate set screws for determining the position ofcradle 23 on shaft 22 and for determining the position of bearing case30 on traveler 10.

Functionally and mechanically explaining the mentioned embodiments ofthe feed mechanism of the present invention, the metallic wire a isthreaded along the guide grooved pulleys 14, 16 and 17, while the cradle23 having the guide grooved pulleys 16, 17 is swingable' in the traveler10 together with the sharp edge of the roller 35 below the verticalshaft 22 contacting the feed shaft 6 under constant spring pressure.

The metallic wire or the enameled wire a leads from a spool not shown tothe pulley 17 with a brake shoe of felt or the like acting on the spoolto control rotation of the spool.

The wire 0 also passes over the pulleys 16, 15, 14 and is pulled by thebobbin mounted on the main shaft 1.

One revolution of the bobbin with one revolution of the main shaft 1further pulls and winds up one convolution or winding of the wire a.

Next revolution of the bobbin tends to make next convolution or windingengage the first convolution of the wire a but the next convolution willalways slip to a position next to the first convolution owing to itsslippery metallic surface and its tension so that this results in twoneighbor convolutions, which will cause a certain deviation of bothpulleys l6, 17 from the neutral position as shown in FIG. 3 owing topulling tension of the wire a while slightly changing its windingdirection.

Therefore the vertical shaft 22 and the supporter 36 also deviate sothat the edge of the roller 35 contacts obliquely on the feed shaft 6.It will be noted from FIGS. 2 and 3 in particular that the groove of thepulley 16 and the sharp edge of the roller 35 are located in a commonplane which contains the axis of the swivel shaft 22 with this latteraxis perpendicularly intersecting and extending across the axes of thepulley 16 and roller 35.

Then rotation of the feed shaft 6 will make the roller 35 rotate to anoblique direction with respect to the axis of the feed shaft 6 so thatthe traveler 10 advances gradually on the feed shaft 6 to the right inFIG. 1 and 4 a movement of the traveler 10 is somewhat late with respectto movement of winding part of the wire 4.

This movement of the traveler 10 to the right depends upon reaction ofthe starting end flange of the bobbin against wire a to deviate wiredirection.

Winding operation continues to the other end flange of the bobbin whichstops further winding while tendency of double winding of the wire a atthe other end flange will cause its upper part to slip down to the backadjacent position of its lower part owing reaction of the other endflange and its slippery surface as also before mentioned, so that thewire winding direction will reverse and the winding operation continueswith a return pass so as to make a new upper layer series ofconvolutions of the wire a on the next lower layer thereof tightly.

These forward and return winding operations repeat alternately betweenthe both end flanges of the bobbin.

The vertical bearings 32, 33 are antifrictional to the horizontaldirection and the horizontal bearing 34 is antifrictional to thevertical direction for smooth rotation of the vertical shaft 22.

The rollers 11, 12 and the guide shaft 13 are also antifrictional sothat feeding is very exact and sensitive in compliance with variation ofthickness of the wire a. It will be noted that the pedestal 2 andsub-pedestal 2a form a support means, the pedestal 2 carrying the rotaryshaft 1 while the pedestal 2a carries the rotary shaft 13 and 6. Theunit 10 forms a traveler means which engages the rotary feed shaft 6 insuch a way as to be freely movable axially therealong as well asangularly thereabout, this latter angular movement of the traveler means10 being prevented only by engagement of the rollers 11 and 12 with theshaft 13. In this way the spring means formed by the spring 37 achievesa substantially constant pressure for the sharp-edged roller 35 againstthe feed shaft 6.

As many embodiments of this invention may be made without departing fromthe spirit and scope thereof, it is to be understood that the inventionincludes all such modifications and variations as come within the scopeof the appended claims.

What I claim is:

1. In a feed mechanism for a coil winder, support means, a rotary feedshaft carried by said support means, traveler means coacting with saidfeed shaft for moving freely therealong, said support means alsosupporting said traveler means for free movement parallel to said feedshaft, said traveler means carrying a swivel rod whose axis isperpendicular to the axis of said feed shaft and supporting said swivelrod for free swiveling movement about its axis, a feed roller having arelatively sharp peripheral edge engaging said feed shaft, said feedroller being operatively connected with said rod for swiveling movementtherewith and having a neutral position where the axis of rotation ofsaid roller is parallel to the axis of said feed shaft, said feed rollerbeing located between said rod and feed shaft, a plurality of guidepulleys carried by said traveler means for guiding wire to a bobbin onwhich the wire is to be wound, said guide pulleys having groovedperipheries for receiving and guiding wire and including at least oneguide pulley situated beyond said rod distant from said feed roller sothat said rod extends between said one guide pulley and said feedroller, said one guide pulley being operatively connected with said rodfor swiveling movement therewith and said peripheral groove of said oneguide pulley and said peripheral edge of said feed roller being locatedin a common plane which contains the axis of said rod with the latteraxis extending perpendicularly across the axes of said one guide pulleyand feed roller and with the latter axes being parallel to each other,said support means carrying an elongated guide shaft which is parallelto said feed shaft, said traveler means carrying rollers situated onopposed sides of and engaging said guide shaft to limit angular turningof said traveler means with respect to said feed shaft, said travelermeans including a pivoted carrier engaging said feed shaft at a side

1. In a feed mechanism for a coil winder, support means, a rotary feedshaft carried by said support means, traveler means coacting with saidfeed shaft for moving freely therealong, said support means alsosupporting said traveler means for free movement parallel to said feedshaft, said traveler means carrying a swivel rod whose axis isperpendicular to the axis of said feed shaft and supporting said swivelrod for free swiveling movement about its axis, a feed roller having arelatively sharp peripheral edge engaging said feed shaft, said feedroller being operatively connected with said rod for swiveling movementtherewith and having a neutral position where the axis of rotation ofsaid roller is parallel to the axis of said feed shaft, said feed rollerbeing located between said rod and feed shaft, a plurality of guidepulleys carried by said traveler means for guiding wire to a bobbin onwhich the wire is to be wound, said guide pulleys having groovedperipheries for receiving and guiding wire and including at least oneguide pulley situated beyond said rod distant from said feed roller sothat said rod extends between said one guide pulley and said feedroller, said one guide pulley being operatively connected with said rodfor swiveling movement therewith and said peripheral groove of said oneguide pulley and said peripheral edge of said feed roller being locatedin a common plane which contains the axis of said rod with the latteraxis extending perpendicularly across the axes of said one guide pulleyand feed roller and with the latter axes being parallel to each other,said support means carrying an elongated guide shaft which is parallelto said feed shaft, said traveler means carrying rollers situated onopposed sides of and engaging said guide shaft to limit angular turningof said traveler means with respect to said feed shaft, said travelermeans including a pivoted carrier engaging said feed shaft at a sidethereof opposite from said feed roller and a spring means connected tosaid carrier and part of said traveler means for providing asubstantially constant pressure between said feed roller and feed shaft,a handle being connected to said carrier for swinging the latter inopposition to said spring means to a position which will reduce thepressure between said traveler means and feed shaft for facilitatingadjusting of said traveler means along said feed shaft.